The pseudotracheae secrete enzyme-filled saliva and soak up fluids and dissolved foods by capillary action.

拟气管细管作用分泌充满酶的唾液渗入它们的食物。

In fact, without the limitations of gravity on capillary action, directing liquids through these micro-structures could be extremely efficient.

事实， 如果没有重力对细管作用的限，引导液体些微结构可能会非常有效。

Trees use capillary action to draw water up from the roots in tiny tubes – a process that depends on the way water molecules stick to themselves and their surroundings due to surface tension.

树木利用细管作用将水从细管中的根部吸——一程取决于水分子由于表面张力而粘附在自身及其周围环境的方式。

This is called " capillary action, " and happens partly because the molecules of liquid that are outside the tube are attracted to the ones that are inside of it, so they sort of follow them in.

被称为“细管作用”， 发生的部分原因是管外的液体分子被管内的液体分子吸引，因此它们会跟随它们进入。